Concentration of new vocab in exercises
On topics that have a lot of lessons, for example, present tense verbs, it seems like some lessons will introduce so many new words that I feel overwhelmed, while others have no new words and are just review. I think that it would be better to have the new vocabulary more spread out through all the lessons.
Good point. I'm doing the early Spanish lessons. In one of the food lessons, I noticed how it starts by introducing 4-5 new words, and then expects me to use them in a translation. While some other lessons will introduce a new word and show it in 2-3 sentences before expecting me to use it myself.
I agree with this point in general - the exercises do not match the new grammar lessons very closely. For example, I have just done German lessons on the Dative Personal Pronoun (to me, to them, with them, with us etc.), but the exercises featured mainly the Dative Personal Adjectives (with our friends, for your father etc.) which had not been explained. Also, a particular idiomatic expression was included in the exercises because it uses a dative pronoun, but it was not explained. Trial and error makes for losing a lot of hearts! I would prefer better explanations first!